Linux command
| COMMAND | COMMAND MEAN |
| cal | Current month, date calender |
| Cal 2022 | Whole year calendar of 2022 |
| Cal 1947 | Whole year calendar of 1947 |
| Cal 08 1947 | Display the calendar of august 1947 |
| history | Show the whole history of command that’s performed. |
| who | Which user is login |
| whoami | Root (User info) |
| clear | Clear the screen |
| hostname | Show the host name of machine |
| Hostnamectl set-hostname hcl1.com | Change machine name |
| hostnamectl | Use to query and change the system hostname and related settings. |
| Date | Show the current date and time |
| Uname
ex-Linux |
Print the information about current machine and the operating system running on it. |
| Uname -a | -a all the info of unmae command |
| Uname -r | Print the kernel release |
| Umane -s | Print the kernel name |
| Uname -o | Print the operating system name |
| Timedatectl | It is use to query and change the system clock and its setting.
You can see the current time and date |
| Timedatectl set-time “2022-03-07 16:48” | We can change the time. |
| Timedatectl set-time “2022-03-07 4:32:03” | We can change the time. |
| Timedatectl set-timezone “Asia/kolkata” | We can change the time. |
| Timedatectl list-timezones | Display time zone list |
| Timedatectl set-ntp false
Timedatectl set-ntp true |
NTP stands for Network Time Protocol is an internet protocol, which is used to synchronize the system clock between computers. The timedatectl utility enables you to automatically sync your Linux system clock with a remote group of servers using NTP.
Controls whether network time synchronization is active and enabled (if available). If the argument is true, this enables and starts the first existing network synchronization service. If the argument is false, then this disables and stops the known network synchronization services. |